* {
    padding: 0;
    margin: 0;
    list-style: none;
    border: 0;
}

.all {
    width: 500px;
    height: 200px;
    padding: 7px;
    border: 1px solid #ccc;
    margin: 100px auto;
    position: relative;
}

.screen {
    width: 500px;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.screen li {
    width: 500px;
    height: 200px;
    overflow: hidden;
    float: left;
}

.screen ul {
    position: absolute;
    left: 0;
    top: 0px;
    width: 3000px;
}

.all ol {
    position: absolute;
    right: 10px;
    bottom: 10px;
    line-height: 20px;
    text-align: center;
}

.all ol li {
    float: left;
    width: 20px;
    height: 20px;
    background: #fff;
    border: 1px solid #ccc;
    margin-left: 10px;
    cursor: pointer;
}

.all ol li.current {
    background: #DB192A;
}

#arr {
    display: none;
}

#arr span {
    width: 40px;
    height: 40px;
    position: absolute;
    left: 5px;
    top: 50%;
    margin-top: -20px;
    background: #000;
    cursor: pointer;
    line-height: 40px;
    text-align: center;
    font-weight: bold;
    font-family: '黑体';
    font-size: 30px;
    color: #fff;
    opacity: 0.3;
    border: 1px solid #fff;
}

#arr #right {
    right: 5px;
    left: auto;
}